The land was originally commissioned in 1942 as the Walter Knott Training Field, a Naval landing base.
The park contains three distinct lakes that serve as focal points for fishing and recreational water activities.
It is home to an archery range that is one of the few dedicated facilities of its kind in Orange County public parks.
The park's namesake refers to its original design layout, which spanned exactly one square mile of land.
During the Vietnam War, the site served as a processing center for refugees arriving in the United States.
The park contains a dedicated memorial monument commemorating the history of the site as a military landing strip.
Mile Square Regional Park is a 607-acre urban recreation area located in Fountain Valley, California, originally serving as a naval landing field during World War II. The park features two regulation 18-hole golf courses and an 18-hole executive golf course. Visitors have access to three large lakes, with pedal boat rentals available on North Lake. Recreational infrastructure includes baseball fields, soccer fields, tennis courts, and archery ranges. Extensive picnic areas with BBQ facilities are distributed throughout the grounds. The park provides paved trails suitable for walking, jogging, and cycling. It serves as a regional hub for organized youth sports leagues throughout the year. The landscape includes diverse vegetation and wooded areas providing significant shade. The site is managed by Orange County Parks and remains open to the public daily.
The pedestrian bridge overlooking the central lake during golden hour.
Bring a fishing license if you intend to fish in the designated lake areas.
Check the county park website for sports field closures due to maintenance or weather before heading out.
Visit the northern section if you prefer quieter, tree-shaded walking paths away from the sports complexes.
Attempting to find shade in the open sports field areas during mid-day heat.
Dogs must remain on a leash at all times; alcohol is prohibited without a specialized permit.
